Corrugating tool for shears



July 10, 1934. E. o. REIST I CORRUGATING TOOL FOR SHEARS Filed July 8, 1933 INVENTOR'.\ L a w Patented July ll), 1934 burrs sir res messes CORRUGATIN'G' TOOL FOR .SHEARS Ezra 0. Reist, Royal Oak, Mich, assignor of fifty one-hundredths to Alva L. Ryan, Royal Oak, Mich.

Application July 8, 1933, Serial No. 679,510

' 2 Claims. (01. 7e s9.1)

My invention relates to corrugating tools for shears and is more particularly applicable to barbers shears. In shears of this kind it is cu's tomary, after the blades have been sharpened in the ordinary way, to corrugate or serrate the"cut ting edge by filing or other means insuch manner that when the co-acting edges engage atuft or lock of hairythe corrugations will engage the loose fibers and prevent them from slipping away .10 on the cutting edges as would happen if the said edges were formed with plane surfaces only. Such corrugation, when properly performed, has the eifect of throwing the severed portions of r the hair in a backward direction towards the barber instead of projecting them upon the customer as is the case with ordinary shears.

The principal object of my said invention is to provide a tool by which the cutting edges may be quickly and easily corrugated in an accurate and efficient manner without the necessity of such skill on the part of the operator as is required with the methods at present in use.

Another object of my said invention is to provide a tool which will, during each successive operation upon the blades, follow the corrugations previously made, instead of practically removing the previous corrugations and starting a fresh series of the same every time as occurs when the work is being done by the filing method.

A further object of my said invention is to provide a tool of the character described which is simple in operation and economical to manufacture, and which at the same time provides a better cutting edge than is possible with the present Lmethod of sharpening.

With these and other objects in view, the invention consists in the improved construction, arrangement, and combination of parts which will be hereinafter fully described, reference being '45filhad to the accompanying drawings, which illustrate a preferred embodiment thereof, in which drawings- Figure 1 is a side elevation.

Figure 2 is a plan View.

Figure 3 is an end elevation.

Figure 4 is a section on line 4-4 of Figure 1.

Figure 5 is a section on line 55 of Figure 1, and

Figure 6 is a fragmentary section corresponding to that shown in Figure 4 but illustrating a 5(yf'modified arrangement of the corrugating roller.

Like characters designate corresponding parts throughout the several views.

1, 2 are a pair of jaw members articulated at 3 by means of the bolt 4 provided with a head 5 and mm 6, both of which are fitted within recesses within the members in the manner well known in the art. Integral with the members 1 and 2 are the handles '7 and 8, respectively, the said handles being in general of oval cross section and widened about their middle so as to present a surface convenient for pressure of the hands.

The members 1 and 2 extend for some distance from the-pivot in a co-planar direction relative to the handles, as indicated at 11 in Figure 2, after which they are offset in an angular direction, as shown at 12 in the same figure. Within the lower member 2 is a groove 13 of substantially rectangular cross section having parallel sides and located at a short distance from the face 14, the size and arrangement of said groove being such that shear blades of various sizes and lengths will be able to pass in and out of the same in a lengthwise direction, the point of the blade in the extreme inward position passing in front of the nut 6 and projecting to any required, distance, as indicated for example at 15, the com.- panion blade of the shears at this time occupying a position approximately at right angles to the one being operated on, as indicated at 16. Within the member 1, and in vertical registration with the groove 13 is an opening 17, and partly within this opening is a knurling wheel 18 having a beveled face 19 and rotatably mounted upon a pivot 20 secured in position in the said member by riveting, screw thread, or other means. The angle of the beveled face 19 of the knurling wheel, with regard to its plane of rotation, is slightly more than the included angle of the cutting edge of the shear blade, so that when a blade is inserted for its full length within the groove 13, the jaws 1 and 2 being in the open position as indicated in broken lines in Figure 1 and the handles 7, 8 pressed together while the blade is being withdrawn, the knurling face 19 rides more heavily on the extreme portion of the cutting edge of the blade and corrugates or serrates it in the manner desired. During this operation the impact of the knurling too-l against the thin cutting edge tends to peen the same over, forming a lateral burr thereupon, and in order to remove this burr and produce a more perfect cutting edge, there is provided a shaving tool or knife 21 mounted in a groove in the member 1 and secured in position by a screw 22, the said knife being so positioned as to produce a shaving efiect upon the blade and remove the said burr, as will be understood.

It will be observed from the foregoing description and by reference to the drawing that I have provided a tool of simple construction by which the desired corrugation may be produced quickly and effectively and without any great degree of skill on the part of the operator. It will be observed also that the teeth of the knurling tool will naturally follow the corrugations previously made in the blade so that the blade will last for a much longer period than is the case when the old corrugations are removed each time, as occurs with the filing system.

While I have herein described and shown a preferred embodiment of my invention, it will. be readily understood by those skilled in the art that the same may be modified in various ways to meet any particular or peculiar requirement, without departing from the spirit of my invention. For example, the knurling wheel 18, instead of having its plane of rotation parallel with the face of the jaws as herein shown, may be set at an angle thereto, in which case the face 19 will be arranged at right angles to the said plane as indicated in Figure 6. Also, in some cases my improved tool may be utilized for the sharpening of shears of the ordinary type, in which case the wheel 18 will be provided with a smooth operating face, the said face serving to first roll or peen over the cutting edge, after which the shaving tool will remove the rolled over portion so as to leave a very sharp finished edge having a definite and constant cutting angle throughout its length.

Having thus described my said invention, what I claim and desire to secure by Letters Patent of the United States is:

1. A tool for serrating the cutting edges of shear blades comprising a pair of plier members hinged together and provided at one end with handles and at the other end with opposed jaws, one of said jaws being formed as a guide for the shear blade to be operated upon, and a serrating wheel rotatably mounted upon the co-acting jaw whereby when the blade is squeezed between the jaws and drawn longitudinally in relation thereto the said wheel will form serrations in the cutting edge at an angle determined by the guide.

2. A tool for serrating the cutting edge of shear blades comprising a pair of plier members hinged together and provided at one end with handles and at the other end with opposed jaws, a serrating wheel rotatably mounted upon one of said jaws, a groove in the other-jaw adapted to guide the shear blade, and a fixed scraper member arranged in co-operative relation with said guiding groove, whereby when the blade is squeezed between the jaws and drawn longitudinally in relation thereto the cutting edge will first be serrated by the wheel and the burrs formed during the serrating operation will then be removed from the inner face of the blade.

EZRA O. REIST. 

